The Audi CTUD is a 1,968 cc, inline — four turbo — diesel engine produced between 2016 and 2020. It belongs to the EA288 Evo engine family, featuring common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard configuration it delivers 110 kW (150 PS) with 340 Nm of torque, offering a balance of fuel efficiency and strong low — end pull for everyday driving.
Fitted to models including the 8V A3, B9 A4, and C7 A6, the CTUD w…
Production years 2016–2018 meet Euro 6b standards; 2019–2020 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/EMS/7890).
The Audi CTUD is a 1,968 cc inline-four turbo-diesel engine from the EA288 Evo series, designed for compact and mid-size models (2016–2020). It integrates variable geometry turbocharging with common rail injection and dual overhead camshafts to deliver responsive low-RPM torque and improved emissions control. Engineered to meet Euro 6b and later Euro 6d-TEMP standards, it balances drivability with stringent environmental compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 110 kW (150 PS) @ 3,250–4,200 rpm | |
Torque | 340 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common rail (up to 2,000 bar) | |
Emissions standard | Euro 6b (2016–2018); Euro 6d-TEMP (2019–2020) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Honeywell variable geometry turbo (VGT) with air/water intercooling | |
Timing system | Timing chain (double-row, front-mounted) | |
Oil type | VW 507 00 / 505 00 (SAE 5W-30) | |
Dry weight | 148 kg |
The Audi CTUD was used across Audi's 8V/B9 platforms with transverse mounting and shared within the Volkswagen Group. This engine received platform-specific adaptations-integrated starter-generator (ISG) in mild-hybrid variants and revised cooling in high-performance S4 applications-and from 2018 the facelifted A4 B9 adopted updated emissions controls, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CTUD's primary reliability risk is high-pressure fuel pump wear on early builds, with elevated incidence in high-mileage and performance-oriented use. Internal Audi quality reports from 2017 indicated a significant share of pre-2018 engines requiring HPFP replacement before 150,000 km, while VCA MOT data links a portion of fuel system failures to degraded injection timing in urban-driven examples. Frequent high-load operation and poor fuel quality increase pump and cam lobe stress, making fuel specification and maintenance adherence critical.
Analysis derived from Audi technical bulletins (2016-2020) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CTUD is generally robust when maintained properly, but early models (2016–2017) are prone to HPFP and timing chain issues. Later revisions (post-2018) improved component durability. Regular use of high-quality diesel (EN 590), correct oil (5W-30 VW 507 00), and adherence to service intervals greatly enhance longevity. Well-maintained units reliably exceed 200,000 km.
Primary issues include high-pressure fuel pump wear due to cam follower lobe degradation, timing chain tensioner failure, and EGR/intake carbon buildup. DPF clogging from short trips and turbo actuator sticking are also reported. These are documented in Audi service bulletins and addressed through revised components from 2018 onward.
The CTUD engine was used in the Audi A3 (8V, 2016–2020), A4 (B9, 2016–2020), and A6 (C7, 2016–2018) as the 2.0 TDI 150 PS variant. It also appears in Volkswagen Group models like the Passat B8. Euro 6b applies to pre-2019 models; Euro 6d-TEMP for later builds.
Yes. The CTUD responds well to ECU remapping, with stage 1 tunes typically achieving 180–200 PS safely. Stock internals handle moderate increases, but supporting mods (intercooler, exhaust) are recommended for higher power. Tuning should preserve factory safety margins to avoid EGR/DPF strain or fuel system overload.
In combined driving, expect 5.0–5.8 L/100km (49–58 mpg UK). Highway efficiency improves to ~4.5 L/100km (~62 mpg UK), while city driving may reach 6.5 L/100km (~43 mpg UK). Real-world consumption depends on driving style and route. Start-stop systems in later models improve urban economy.
Yes. The CTUD is an interference engine, meaning a timing failure can result in piston-to-valve contact and severe internal damage. Proper chain maintenance and timely repairs are essential. Any timing-related warning should be addressed immediately to prevent catastrophic engine failure.
Audi specifies SAE 5W-30 oil meeting VW 507 00 (diesel) or 505 00 (multi) standards. Use only ACEA C2/C3 or OEM-approved low-SAPS synthetics. Change oil every 15,000 km or annually to protect the turbo, EGR, and fuel system from wear and coking.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.